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${\mathit {\mathit b}}$
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${\mathit {\mathit b}}$
$I(J^P)$ = $0(1/2^{+})$
Charge = $−{1\over 3}$ $\mathit e$
Bottom = $−$1
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${\mathit {\mathit b}}$-QUARK MASS
$4.183 \pm0.007$ GeV CL=90.0%
${\mathit m}_{{{\mathit b}}}/{\mathit m}_{{{\mathit s}}}$ MASS RATIO
$53.88 \pm0.12$
